Grate for marine and stationary boilers.



Patented. Jill 10, 1917.

padaz.

W. C. CODD.

GRATE FOR MARINE AND STATIONARY BOILERS.

APPLICATION FILED NOV. 17, 1915.

WWW

WILLIAM 0. Q0131),

OF BALTIMORE, MARYLAND.

GRATE FOR MARINE AND STATIONARY BOILERS.

Specification of Letters Patent.

Patented July It), 191?.

Application filed November 17, 1915. Serial No. 62,037.

To all whom it may concern:

Be it known that I, \VILLIAM C. Conn, a citizen of the United States,residing at Baltimore and State of Maryland, have invented certain newand useful Improvements in Grates for Marine and Stationary Boilers; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The invention relates to improvements in grates for marine andstationary boilers.

The object of the present invention is to improve the construction ofgrates and to provide a simple, practical and comparatively inexpensivegrate of strong and durable construction adapted to afford an increasedamount of air space between the grate bars and provided with means foradmitting air to the ends of the grate bars to avoid any dead areas inthe grate and to in crease the combustion of the fuel.

A further object of the invention is to pro vide a grate of thischaracter having projections or teeth adapted to discharge or dump ashesmore readily and constructed to deflect the fire tools so as to reduceto a minimum liability of breakage of the grate bars by said fire tools.

With these and other objects in view, the invention consists in theconstruction and novel combination and arrangement of parts hereinafterfully described, illustrated in the accompanying drawing and pointed outin the claims hereto appended, it being understood that various changesin the form, proportion and minor details of construction may beresorted to without departing from the spirit or sacrificing any of theadvantages of the invention.

In the drawing:

Figure 1 is a plan view of a portion of a grate constructed inaccordance with this invention Fig. 2 is a side elevation of the same,

Fig. 3 is a transverse sectional view,

Fig. 4t is a plan view of a single grate bar,

Fig. 5 is a detail longitudinal sectional view of a portion of one ofthe grate bars,

Fig. 6 is an end elevation of the same.

Like numerals of reference designate corresponding parts in the severalfigures of the drawing.

In the accompanying drawing in which is illustrated the preferredembodiment of the invention 1 designates a grate bar consisting of abody portion provided at the side edges with projections 2 and havingterminal proj ections 3 which are rounded and beveled at their upperedges at l to deflect the fire tools and also to cause the projectionsto have a tendency to drop the ashes and enable the same to be morereadily discharged from the grate bars. The projections 2 and 3 arepreferably semi-circular or semi-elliptical and the grate bar isprovided with correspondingly shaped recesses l between the projections.the side projections of the grate bars and also the end projectionsbeing alternately arranged so that the projections of one grate bar willbe located opposite the recesses of the adjacent grate bar to form asubstantially serpentine or wavy intervening space for the passage ofair, whereby a greater air space is afforded than is possible withstraight grate bars. The grate bar is also provided when desired withopenings 5 extending longitudinally of the grate bar and arranged atintervals and having projections 6 and intervening recesses 7. theprojections at one side of the openings being located opposite therecesses of the opposite side to provide a serpentine or wavy opening.The grate bars may be made of any de sired width and when relativelywide grate bars are employed they are designed to be provided with aplurality of longitudinally disposed grate flanges 8 of suflicientnumber to eifectively prevent the grate bar from warping.

The grate bars are provided at the end projection with notches 9extending longitudinally of the grate bars and adapted to afford passageof air to the ends of the grate bars to prevent dead spaces and tosecure more perfect combustion at the terminal portions of the gratebars. The end notches 9 may be tapered downwardly, as illustrated inFig. 5 of the drawing to tend to discharge the ashes but the side wallsof the notches 5) maybe vertical and parallel if desired. The grate barsare provided in their upper faces with longitudinal grooves 10, whichextend the entire length of the grate bars as shown.

The intervening spaces between the grate bars and the sides of theopening of the body portions of the grate bars are designed to be madeaccording to the character of the fuel employed for heating the boilerwith which the grate bars are to be used. a relatively small separationof the bars being provided for fine pea coal and a greater separationfor larger coal and soft coal.

lVhat I claim is:

1. A grate of the class described including grate bars provided withside and end projections arranged at intervals to form interveningrecesses and rounded at their ends and beveled at their upper edges, therecesses conforming substantially to the configuration of theprojections, and the projections at the sides of the grate bars beingarranged opposite the recesses of the adjacent grate bar, said gratebars being also provided at intervals with longitudinal openings havingrounded projections and intervening recesses corresponding to the shapeof the said projections and alternating with the same, serpentine orwavy-spaces being formed in teriorly and eXteriorly of the grate bars.

2. A grate of the class described including grate bars provided withside and end projections arranged at intervals to form interveningrecesses and rounded at their ends and beveled at their upper edges, therecesses conforming substantially to the configuration of theprojection, and the projections at the sides of the'grate bars beingarranged opposite the recesses of the adjacent grate bar, said grate barbeing also provided at intervals with longitudinal openings havingrounded projections and intervening recesses corresponding to the shapeof the said projections, and alternating with the same, serpentine orwavy spaces being formed interiorly and exteriorly of the grate bars andthe terminal projections having narrow oblong notches extendinglongitudinally of the grate bars and tapered in width from the lowerfaces of the projections to the upper faces ofthe same to providedownwardly diverging inclined side walls to effect a discharge of ashesinto the ash pit.

I In testimony whereof I affix my signature in presence of twowitnesses. 7

WILLIAM G. CODD. Witnesses WILLIAM Hissnr, J11, F. Ml. I-IIssnY. 7

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, 1). C.

